(a)
(b)
Figure 4: Distribution of species richness (a) and phylogenetic diversity (b) of Apocynaceae in northeastern Brazil, using cells with one neighborhood cell; 0.5° cells with black margins present exceptionally high (5% highest) phylogenetic diversity without neighborhood in Chapada Diamantina (CD) and Bahia Costal Forest (BCF); 0.08° cells present exceptionally high (2.5% highest) phylogenetic diversity with (black margins) and without neighborhood cells (black squares) in CD and BCF.